In this pathbreaking book, historian Mary Kilbourne Matossian argues that epidemics, sporadic outbursts of bizarre behavior, and low fertility and high death rates from the fourteenth to the eighteenth centuries may have been caused by food poisoning from microfungi in bread, the staple food in Europe and America during this period.

In this pathbreaking book, historian Mary Kilbourne Matossian argues that epidemics, sporadic outbursts of bizarre behavior, and low fertility and high death rates from the fourteenth to the eighteenth centuries may have been caused by food poisoning from microfungi in bread, the staple food in Europe and America during this period.